SIRI closed @ .371.............why are trades allowed to go through seconds after the closing bell?
http://www.nasdaq.com/aspx/nlstrades...&selected=SIRI
NASDAQ Last Sale (NLS) Intraday Trade History:
  Sirius XM Radio Inc.
 
NLS Time (ET)	NLS Price	NLS Share Volume
16:00:05	 $ .371 	39,500
16:00:05	 $ .371  	297
16:00:05	 $ .371 	11,900
16:00:05	 $ .371  	29,000
16:00:05	 $ .371 	800
16:00:05	 $ .371  	9,500
16:00:05	 $ .371 	100
16:00:05	 $ .371  	260
16:00:05	 $ .371 	542
16:00:05	 $ .371  	542
16:00:05	 $ .371 	542
16:00:05	 $ .371  	542
16:00:05	 $ .371 	542
16:00:05	 $ .371  	10,000
16:00:05	 $ .371 	200
16:00:05	 $ .371  	4,800
16:00:05	 $ .371 	325
16:00:05	 $ .371  	5,371
16:00:05	 $ .371 	1,789
16:00:02	 $ .371  	100
16:00:02	 $ .371 	4,978
16:00:02	 $ .371  	313
16:00:02	 $ .371 	57,300
16:00:02	 $ .371  	1,350
16:00:02	 $ .371 	6,900
16:00:02	 $ .371  	1,600
16:00:02	 $ .371 	339
15:59:55	 $ .3788  	600
15:59:52	 $ .3777 	10,000
15:59:41	 $ .3798  	533
15:59:39	 $ .3762 	3,300
15:59:39	 $ .3798  	1,675
15:59:39	 $ .38 	1,675
15:59:39	 $ .3798  	6,500
15:59:39	 $ .38 	6,500
15:59:37	 $ .3799  	130
15:59:36	 $ .3768 	488
15:59:34	 $ .377  	200
15:59:26	 $ .38 	6,030
15:59:26	 $ .38  	4,000
15:59:26	 $ .38 	2,000
15:59:26	 $ .38  	400
15:59:26	 $ .38 	2,260
15:59:26	 $ .38  	100